OPERATIONAL DEFECT DATABASE
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Changing the length of a string BSON element in storage.bson to a very large number can cause a segfault. Please see attached storage.bson and stack trace for reference. stack trace: ➜ dev.mongo git:(master) ✗ lldb -- ./mongod (lldb) target create "./mongod" Current executable set to './mongod' (x86_64). (lldb) r Process 24578 launched: './mongod' (x86_64) Process 24578 stopped * thread #1: tid = 0x1f7f86, 0x00007fff95ecc135 libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell + 533, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x1036ffffd) frame #0: 0x00007fff95ecc135 libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell + 533 libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell: -> 0x7fff95ecc135 : vmovups -0x40(%rsi), %ymm2 0x7fff95ecc13a : subq $0x40, %rsi 0x7fff95ecc13e : subq $0x40, %rdx 0x7fff95ecc142 : ja 0x7fff95ecc122 ; (lldb) bt * thread #1: tid = 0x1f7f86, 0x00007fff95ecc135 libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell + 533, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x1036ffffd) * frame #0: 0x00007fff95ecc135 libsystem_platform.dylib`_platform_memmove$VARIANT$Haswell + 533 frame #1: 0x00007fff9d07b225 libc++.1.dylib`std::__1::basic_string, std::__1::allocator >::__init(char const*, unsigned long) + 91 frame #2: 0x00000001000231eb mongod`mongo::BSONElement::str() const [inlined] std::__1::basic_string, std::__1::allocator >::basic_string(this=, __s=, __n=) + 155 at string:2024 frame #3: 0x00000001000231e0 mongod`mongo::BSONElement::str() const [inlined] std::__1::basic_string, std::__1::allocator >::basic_string(__s=, __n=) at string:2022 frame #4: 0x00000001000231e0 mongod`mongo::BSONElement::str(this=) const + 144 at bsonelement.h:359 frame #5: 0x000000010063e136 mongod`mongo::StorageEngineMetadata::read() [inlined] mongo::BSONElement::String(this=) const + 3734 at bsonelement.h:79 frame #6: 0x000000010063e116 mongod`mongo::StorageEngineMetadata::read(this=0x0000000103300c40) + 3702 at storage_engine_metadata.cpp:182 frame #7: 0x000000010063d0a3 mongod`mongo::StorageEngineMetadata::forPath(dbpath=) + 259 at storage_engine_metadata.cpp:70 frame #8: 0x000000010063ec72 mongod`mongo::StorageEngineMetadata::getStorageEngineForPath(dbpath=0x00007fff5fbfdf68) + 34 at storage_engine_metadata.cpp:82 frame #9: 0x0000000100599739 mongod`mongo::ServiceContextMongoD::initializeGlobalStorageEngine(this=0x0000000103719b00) + 89 at service_context_d.cpp:81 frame #10: 0x00000001000018b9 mongod`mongo::_initAndListen(listenPort=) + 377 at db.cpp:414 frame #11: 0x0000000100001103 mongod`mongo::initAndListen(listenPort=) + 19 at db.cpp:592 frame #12: 0x000000010000688c mongod`main [inlined] mongoDbMain(int, char**, char**) + 995 at db.cpp:822 frame #13: 0x00000001000064a9 mongod`main(argc=, argv=, envp=) + 25 at db.cpp:637 frame #14: 0x00007fff91a4a5ad libdyld.dylib`start + 1 frame #15: 0x00007fff91a4a5ad libdyld.dylib`start + 1 (lldb)
dan.solnik commented on Wed, 26 Jun 2019 17:57:36 +0000: When trying to reproduce, it seems like this problem has been fixed. 2019-06-26T11:53:21.081-0400 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none' 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] MongoDB starting : pid=6903 port=27017 dbpath=/data/db 64-bit host=Daniels-MacBook-Pro-7.local 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] db version v4.0.10 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] git version: c389e7f69f637f7a1ac3cc9fae843b635f20b766 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] allocator: system 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] modules: enterprise 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] build environment: 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] distarch: x86_64 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] target_arch: x86_64 2019-06-26T11:53:21.086-0400 I CONTROL [initandlisten] options: {} 2019-06-26T11:53:21.086-0400 E STORAGE [initandlisten] Unable to read the storage engine metadata file: InvalidBSON: invalid bson in element with field name 'engine' in object with unknown _id 2019-06-26T11:53:21.086-0400 F - [initandlisten] Fatal Assertion 28661 at src/mongo/db/storage/storage_engine_metadata.cpp 93 2019-06-26T11:53:21.086-0400 F - [initandlisten] ***aborting after fassert() failure
1. replace your storage.bson with the one attached 2. start mongod
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